From: Kevin O'Connor <kevin@koconnor.net>
Date: Mon, 12 May 2014 05:26:26 +0000 (-0400)
Subject: vgabios: Add debug message if x86emu leal check triggers.
X-Git-Tag: rel-1.7.5~4
X-Git-Url: http://xenbits.xensource.com/gitweb?a=commitdiff_plain;h=3c37cdb1977056f875edb48513729409bd752d57;p=seabios.git

vgabios: Add debug message if x86emu leal check triggers.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
---

diff --git a/vgasrc/vgaentry.S b/vgasrc/vgaentry.S
index 6e31c4e..11197f1 100644
--- a/vgasrc/vgaentry.S
+++ b/vgasrc/vgaentry.S
@@ -47,7 +47,17 @@ _rom_header_signature:
 
         // Force a fault if found to be running on broken x86emu versions.
         DECLFUNC x86emu_fault
+msg:    .ascii "SeaVGABIOS: x86emu leal trap!\n"
 x86emu_fault:
+#if CONFIG_DEBUG_IO
+        movw %cs:DebugOutputPort, %dx
+        movw $msg, %si
+1:      movb %cs:(%si), %al
+        outb %al, (%dx)
+        incw %si
+        cmpw $x86emu_fault, %si
+        jl 1b
+#endif
 1:      hlt
         jmp 1b